Most cactus spines are fairly straight, but the fishhook barrel cactus has spines curved into a fishhook shape (I don't mean barbs). Are there any good ideas why that shape evolved?

Close up spines fishhook cactus hi-res stock photography and

fishhook barrel cactus (Cactus of Metro Phoenix (April 2021

Are cactus spines dangerous? - Quora

Practical Biology: science for everyone: Barrel Cactus Part 1

Most cactus spines are fairly straight, but the fishhook barrel

Most cactus spines are fairly straight, but the fishhook barrel

fishhook barrel cactus (Cactus of Metro Phoenix (April 2021

Close up spines fishhook cactus hi-res stock photography and

Most cactus spines are fairly straight, but the fishhook barrel

fishhook barrel cactus (Cactus of Metro Phoenix (April 2021